UV Lecture 2 - Absorption of Electromagnetic Radiation

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Which process does NOT typically occur in a molecule upon absorption of electromagnetic radiation?

Isomerization

Vaporization (correct)

Excitation

Decay

What can a molecule undergo upon absorption of electromagnetic radiation?

Solidification

Oxidation

Fusion

Ionization (correct)

Which of the following is NOT a common result of a molecule absorbing electromagnetic radiation?

Formation of new elements (correct)

Increase in kinetic energy

Change in molecular structure

Breakage of chemical bonds

What is one of the possible outcomes for a molecule after absorbing electromagnetic radiation?

Emission of light Signup and view all the answers

What is a potential consequence for a molecule after absorbing electromagnetic radiation?

Transition to an excited state Signup and view all the answers

Which of the following is a region of the electromagnetic spectrum?

Radio waves Signup and view all the answers

Which of these is NOT a region of the electromagnetic spectrum?

Vibrational energy levels Signup and view all the answers

Which pair of items in the list are both regions of the electromagnetic spectrum?

Energy Radio waves, Infrared Signup and view all the answers

Which of the following is an incorrect pairing of a term and its definition?

Nuclear spin levels - a region of the electromagnetic spectrum Signup and view all the answers

Which of the following is a type of energy level, rather than a region of the electromagnetic spectrum?

Vibrational energy levels Signup and view all the answers

What is the relationship between the frequency and wavelength of light or radiation?

Bed is directly proportional to frequency and inversely proportional to wavelength Signup and view all the answers

What can be concluded about the relationship between the wavelength and frequency of light or radiation?

As the wavelength decreases, the frequency increases Signup and view all the answers

Which of the following statements about the relationship between wavelength and energy of light or radiation is correct?

As wavelength decreases, energy increases Signup and view all the answers

What can be inferred about the nature of light or radiation described in the text?

It is a wave-like phenomenon Signup and view all the answers

What is the main concept or principle being described in the given text?

The inverse relationship between frequency and wavelength of electromagnetic radiation Signup and view all the answers

What happens when visible light interacts with a molecule?

It moves electrons from a filled bonding MO to an unfilled anti-bonding MO Signup and view all the answers

How does visible light impact the electron configuration in a molecule?

It excites electrons from filled bonding MOs to unfilled anti-bonding MOs Signup and view all the answers

What type of MO does visible light typically affect in a molecule?

Filled anti-bonding MO Signup and view all the answers

Which type of molecular orbital receives electrons when exposed to visible light?

Anti-bonding MO Signup and view all the answers

In the context of molecular orbitals, what role does visible light play?

Exciting electrons from filled bonding to unfilled anti-bonding MOs Signup and view all the answers

What is the term used to describe the different types of excitations that occur when a molecule absorbs energy?

Transition states Signup and view all the answers

What is required for each type of transition state?

A distinctive energy (ΔE) Signup and view all the answers

What process is being described in the given text?

Molecular absorption spectroscopy Signup and view all the answers

Which of the following is NOT a type of molecular excitation that could be referred to in the text?

Nuclear excitation Signup and view all the answers

What does the abbreviation 'ΔE' stand for in the context of the given text?

Energy difference Signup and view all the answers